Because it is needed in order for them to survive
Answer:
biofuel
Explanation biofuel is man made and can be made with simple ingreadients.
Photosynthesis is the act of changing energy from the sun into chemical energy if thats what you mean!
The purpose<span> of a </span>salt bridge<span> is not to move electrons from the electrolyte, rather it's to maintain charge balance because the electrons are moving from one-half </span>cell<span> to the other. The electrons flow from the anode to the cathode.</span>
primary production is the synthesis of organic compounds from atmospheric or aqueous carbon dioxide.